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  • -2°C
    Sea to Summit Spark Pro -1C Down Sleeping Bag Sea to Summit Spark Pro -1C Down Sleeping Bag
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    Sea to Summit

    Spark Pro -1C Down Sleeping Bag

    Weighs
    637g
    Weighs:
    637g (Regular)
    Comfort Limit:
    -2°C
    Insulation Type:
    Down
    Fill Weight:
    310g (based on regular size)
    Fill Power:
    950
    Down Treatment:
    Hydrophobic
    Zip Length:
    Full Length
    Type:
    Mummy
    Zip Position:
    Left Zip

    UOG TOP PICK—The Spark Pro is an upgraded Spark sleeping bag from Sea to Summit, featuring higher-quality down and improved ventilation options. The bag has a fully detached left-side zip, a foot box zip, and a shoulder-length zip on the right …

    From: £424.99
    RRP: £499.99 | Save: £75.00
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  • -2°C
    Sea to Summit Ascent -1C Down Sleeping Bag Sea to Summit Ascent -1C Down Sleeping Bag
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    Sea to Summit

    Ascent -1C Down Sleeping Bag

    Weighs
    777g
    Weighs:
    777g (Regular)
    Comfort Limit:
    -2°C
    Type:
    Mummy
    Insulation Type:
    Down
    Fill Weight:
    300g (based on regular size)
    Fill Power:
    750
    Down Treatment:
    Hydrophobic
    Zip Length:
    Full Length
    Zip Position:
    Left Zip

    The Sea to Summit Ascent is a lightweight sleeping bag ideal for three seasons. Its 750+ fill power of responsibly sourced duck down provides warmth and is treated to maintain performance in damp conditions. Sea to Summit says:  The Ascent Slee…

    From: £319.99
    RRP: £374.99 | Save: £55.00
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  • -8°C
    Sea to Summit Spark Pro -9C Down Sleeping Bag Sea to Summit Spark Pro -9C Down Sleeping Bag
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    Sea to Summit

    Spark Pro -9C Down Sleeping Bag

    Weighs
    791g
    Weighs:
    791g (Regular)
    Comfort Limit:
    -8°C
    Insulation Type:
    Down
    Fill Weight:
    480g (based on regular size)
    Fill Power:
    950
    Down Treatment:
    Hydrophobic
    Zip Length:
    Full Length
    Zip Position:
    Left Zip
    Type:
    Mummy

    UOG TOP PICK—The Spark Pro sleeping bag by Sea to Summit showcases ethically obtained 950+ fill power down enhanced with a Dry Down coating, boosting moisture resistance and quick-drying capabilities. Its box wall construction strategically...

    From: £509.99
    RRP: £599.99 | Save: £90.00
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  • -2°C
    Sea to Summit Womens Ascent -1C Down Sleeping Bag Sea to Summit Womens Ascent -1C Down Sleeping Bag
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    Sea to Summit

    Womens Ascent -1C Down Sleeping Bag

    Weighs
    895g
    Weighs:
    895g (Regular)
    Comfort Limit:
    -2°C
    Type:
    Mummy
    Insulation Type:
    Down
    Fill Weight:
    459g (based on regular size)
    Fill Power:
    750
    Down Treatment:
    Hydrophobic
    Zip Length:
    Full Length
    Zip Position:
    Left Zip

    UOG TOP PICK—The Sea to Summit Ascent is a lightweight sleeping bag ideal for three seasons. Its 750+ fill power of responsibly sourced duck down provides warmth and is treated to maintain performance in damp conditions. It is a fantastic all-r…

    From: £324.99
    RRP: £384.99 | Save: £60.00
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  • -9°C
    Sea to Summit Ascent -9C Down Sleeping Bag Sea to Summit Ascent -9C Down Sleeping Bag
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    Sea to Summit

    Ascent -9C Down Sleeping Bag

    Weighs
    1025g
    Weighs:
    1025g (Regular)
    Comfort Limit:
    -9°C
    Type:
    Mummy
    Insulation Type:
    Down
    Fill Weight:
    540g (based on regular size)
    Fill Power:
    750
    Down Treatment:
    Hydrophobic
    Zip Length:
    Full Length
    Zip Position:
    Left Zip

    UOG TOP PICK—The Sea to Summit Ascent -9C is a premium down sleeping bag for cold-weather adventures. It provides warmth even in freezing temperatures. The bag is lightweight and features a relaxed mummy shape for comfort. The free-flow zipper.…

    From: £379.99
    RRP: £449.99 | Save: £70.00
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  • -2°C
    Sea to Summit Trek -1C Down Sleeping Bag Sea to Summit Trek -1C Down Sleeping Bag
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    Sea to Summit

    Trek -1C Down Sleeping Bag

    Weighs
    1108g
    Weighs:
    1108g (Regular)
    Comfort Limit:
    -2°C
    Type:
    Mummy
    Insulation Type:
    Down
    Fill Weight:
    380g (based on regular size)
    Fill Power:
    650
    Down Treatment:
    Hydrophobic
    Zip Length:
    Full Length
    Zip Position:
    Left Zip

    Sea to Summit's Trek -1C Down Bag provides versatile temperature control and comfort. It features 650+ fill duck down, a Free Flow zipper system for ventilation, and a generous semi-rectangular shape. The bag is not ultralight but offers a good balan…

    From: £279.99
    RRP: £324.99 | Save: £45.00
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  • -1°C
    Sea to Summit Hamelin -1C/30F Synthetic Sleeping Bag Sea to Summit Hamelin -1C/30F Synthetic Sleeping Bag
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    Sea to Summit

    Hamelin -1C/30F Synthetic Sleeping Bag

    Weighs
    1189g
    Weighs:
    1189g (Regular)
    Comfort Limit:
    -1°C
    Type:
    Mummy
    Insulation Type:
    Synthetic
    Zip Length:
    Full Length
    Zip Position:
    Right Zip

    Versatile, roomy, and reliably warm. Sea to Summit says:  A backpack-capable sleeping bag with a higher level of comfort than traditional mummy bags. For a few extra grams and larger packed size, Hamelin brings the benefits of synthetic insulati…

    From: £154.99
    RRP: £169.99 | Save: £15.00
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  • -2°C
    Sea to Summit Womens Trek -1C Down Sleeping Bag Sea to Summit Womens Trek -1C Down Sleeping Bag
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    Sea to Summit

    Womens Trek -1C Down Sleeping Bag

    Weighs
    1226g
    Weighs:
    1226g (Regular)
    Comfort Limit:
    -2°C
    Type:
    Mummy
    Insulation Type:
    Down
    Fill Weight:
    520g (based on regular size)
    Fill Power:
    650
    Down Treatment:
    Hydrophobic
    Zip Length:
    Full Length
    Zip Position:
    Right Zip

    Sea to Summit's Trek -1C Down Bag provides versatile temperature control and comfort. It features 650+ fill duck down, a Free Flow zipper system for ventilation, and a generous semi-rectangular shape. The bag is not ultralight but offers a good balan…

    £269.99
    RRP: £319.99 | Save: £50.00
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  • -9°C
    Sea to Summit Womens Ascent -9C Down Sleeping Bag Sea to Summit Womens Ascent -9C Down Sleeping Bag
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    Sea to Summit

    Womens Ascent -9C Down Sleeping Bag

    Weighs
    1242g
    Weighs:
    1242g (Regular)
    Comfort Limit:
    -9°C
    Type:
    Mummy
    Insulation Type:
    Down
    Fill Weight:
    797g (based on regular size)
    Fill Power:
    750
    Down Treatment:
    Hydrophobic
    Zip Length:
    Full Length
    Zip Position:
    Right Zip

    The Sea to Summit Ascent -9C is a premium down sleeping bag for cold-weather adventures. It provides warmth even in freezing temperatures. The bag is lightweight and features a relaxed mummy shape for comfort. The free-flow zipper system allows for..…

    From: £409.99
    RRP: £484.99 | Save: £75.00
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  • -1°C
    Sea to Summit Boab -1C/30F Synthetic Sleeping Bag Sea to Summit Boab -1C/30F Synthetic Sleeping Bag
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    Sea to Summit

    Boab -1C/30F Synthetic Sleeping Bag

    Weighs
    1374g
    Weighs:
    1374g (Regular)
    Comfort Limit:
    -1°C
    Type:
    Mummy
    Insulation Type:
    Synthetic
    Zip Length:
    Full Length
    Zip Position:
    Right Zip

    The Boab balances comfort with conscious design. Sea to Summit says:  The Boab is a great choice for campers and vehicle-based adventurers looking for a roomy, comfort-oriented sleeping bag. A #5 zipper continues through the footbox, and the dou…

    From: £119.99
    RRP: £129.99 | Save: £10.00
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  • -9°C
    Sea to Summit Trek -9C Down Sleeping Bag Sea to Summit Trek -9C Down Sleeping Bag
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    Sea to Summit

    Trek -9C Down Sleeping Bag

    Weighs
    1401g
    Weighs:
    1401g (Regular)
    Comfort Limit:
    -9°C
    Type:
    Mummy
    Fill Weight:
    635g (based on regular size)
    Fill Power:
    650
    Down Treatment:
    Hydrophobic
    Zip Length:
    Full Length
    Zip Position:
    Left Zip
    Insulation Type:
    Down

    The Sea to Summit Trek -9°C Down Sleeping Bag offers comfort and reliability for camping and overnight adventures. Its semi-rectangular fit provides ample space for a cosy night's sleep. The bag is designed for cold climates and keeps you comfort…

    From: £314.99
    RRP: £369.99 | Save: £55.00
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  • -1°C
    Sea to Summit Womens Hamelin -1C/30F Synthetic Sleeping Bag Sea to Summit Womens Hamelin -1C/30F Synthetic Sleeping Bag
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    Sea to Summit

    Womens Hamelin -1C/30F Synthetic Sleeping Bag

    Weighs
    1479g
    Weighs:
    1479g (Regular)
    Comfort Limit:
    -1°C
    Type:
    Mummy
    Insulation Type:
    Synthetic
    Zip Length:
    Full Length
    Zip Position:
    Left Zip

    Versatile, roomy, and reliably warm. Sea to Summit says:  A women’s-specific backpack-capable sleeping bag that provides a higher level of comfort than unisex mummy bags. The higher weight compared to a down bag is balanced by the benefits…

    From: £154.99
    RRP: £169.99 | Save: £15.00
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  • -16°C
    Sea to Summit Womens Trek -9C Down Sleeping Bag Sea to Summit Womens Trek -9C Down Sleeping Bag
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    Sea to Summit

    Womens Trek -9C Down Sleeping Bag

    Weighs
    1614g
    Weighs:
    1614g (Regular)
    Comfort Limit:
    -16°C
    Type:
    Mummy
    Fill Weight:
    800g (based on regular size)
    Fill Power:
    650
    Down Treatment:
    Hydrophobic
    Zip Length:
    Full Length
    Zip Position:
    Right Zip
    Insulation Type:
    Down

    The Sea to Summit Women’s Trek -9C Down Sleeping Bag is perfect for cold weather camping. Its 650+ fill power duck-down insulation ensures warmth even in damp conditions. The semi-rectangular fit and Free Flow Zip System provide comfort and...

    £319.99
    RRP: £374.99 | Save: £55.00
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  • -9°C
    Sea to Summit Boab -9C/15F Synthetic Sleeping Bag Sea to Summit Boab -9C/15F Synthetic Sleeping Bag
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    Sea to Summit

    Boab -9C/15F Synthetic Sleeping Bag

    Weighs
    1854g
    Weighs:
    1854g (Regular)
    Comfort Limit:
    -9°C
    Type:
    Mummy
    Insulation Type:
    Synthetic
    Zip Length:
    Full Length
    Zip Position:
    Left Zip

    The Boab balances comfort with conscious design. Sea to Summit says:  The Boab is a great choice for campers and vehicle-based adventurers looking for a roomy, comfort-oriented sleeping bag. A #5 zipper continues through the footbox, and the dou…

    From: £134.99
    RRP: £149.99 | Save: £15.00
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  • -18°C
    Sea to Summit Trek -18C Down Sleeping Bag Sea to Summit Trek -18C Down Sleeping Bag
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    Sea to Summit

    Trek -18C Down Sleeping Bag

    Weighs
    1894g
    Weighs:
    1894g (Regular)
    Comfort Limit:
    -18°C
    Type:
    Mummy
    Fill Weight:
    1000g (based on regular size)
    Fill Power:
    650
    Down Treatment:
    Hydrophobic
    Zip Length:
    Full Length
    Zip Position:
    Left Zip
    Insulation Type:
    Down

    The Sea to Summit Trek -18°C Down Sleeping Bag is ideal for cold-weather camping. Its comfort rating of -11°C and 650+ Fill Power Duck Down provides excellent insulation and warmth. The semi-rectangular fit and ergonomic design offer ample sp…

    £364.99
    RRP: £429.99 | Save: £65.00
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Shop our wide range of the lightest Sleeping Bags available, we have Sleeping Bags from specialist lightweight suppliers such as Big Agnes, Nemo and Sierra Designs as well as 'lightest in class' bags from more established brands such as Rab, Mountain Equipment, Sea to Summit and Thermarest.  We also have a full range of Pillows, Sleeping Bag Liners and other Accessories for your sleep system.

 

We provide accurate weights & full technical specifications. Get our honest verdict on each item along with verified user reviews & in-depth reviews from members of our team and our partners at Trek Scotland. Free UK+EU Delivery on orders over £15. Tracked Royal Mail Delivery as standard for UK orders.